CVE-2017-14474
📋 TL;DR
CVE-2017-14474 is a critical command injection vulnerability in MySQL Multi-Master Replication Manager (MMM) agent daemon that allows remote unauthenticated attackers to execute arbitrary shell commands with the privileges of the mmm_agentd process. This affects organizations using MMM for MySQL replication management where the agent daemon is exposed to network access. Attackers can gain complete control over affected systems through this remote code execution vulnerability.
💻 Affected Systems
- MySQL Multi-Master Replication Manager (MMM)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with root-level access, data exfiltration, lateral movement within the network, and persistent backdoor installation.
Likely Case
Remote code execution leading to database compromise, credential theft, and potential ransomware deployment in production environments.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external access to mmm_agentd port (9989 by default).
🎯 Exploit Status
Exploitation is straightforward - attackers need only send a specially crafted MMM protocol message to the vulnerable service. Metasploit modules and public exploit code are available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: MMM version with fix (specific version not clearly documented in public advisories)
Vendor Advisory: https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0501
Restart Required: Yes
Instructions:
1. Upgrade MMM to the latest patched version. 2. Stop mmm_agentd service. 3. Install updated package. 4. Restart mmm_agentd service. 5. Verify the service is running with the updated version.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to mmm_agentd port (default 9989) using firewall rules
iptables -A INPUT -p tcp --dport 9989 -j DROP
ufw deny 9989
Service Binding Restriction
linuxConfigure mmm_agentd to bind only to localhost/loopback interface
Edit mmm_agentd configuration to set bind_address = 127.0.0.1
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to block all external access to port 9989
- Monitor for unusual network connections to mmm_agentd port and suspicious process execution
🔍 How to Verify
Check if Vulnerable:
Check if mmm_agentd version 2.2.1 or earlier is running and listening on network interfacesCheck Version:
mmm_agentd --version or check package manager: dpkg -l | grep mmm-agent or rpm -qa | grep mmm-agentVerify Fix Applied:
Verify mmm_agentd version is updated and test with vulnerability scanner or attempt to reproduce exploit📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Failed authentication attempts to mmm_agentd
- Unexpected process spawns from mmm_agentd
Network Indicators:
- Unusual network connections to port 9989
- Malformed MMM protocol packets
- Traffic from unexpected sources to mmm_agentd
SIEM Query:
source="mmm_agentd.log" AND (command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*")